A Tourism Australia spokesman said while Australians were eligible to enter the Best Jobs competition, the campaign was designed to showcase Australia's Working Holidaymaker Program to young people around the world.

He said they had already decided to offer a bonus job to an Australian who was unsuccessful in the competition in its social media team.

Twenty-two-year-old photographer and filmmaker Ellenor Argyropoulos, from Melbourne, will create destination content for Facebook, Twitter, Instagram and Google+ and other channels.

Tourism Australia Ellenor ArgyropoulosSource:Supplied

Her first task will be to document the week-long activities that will form part of the final week of challenges for the finalists when they come to Australia next month.

"The competition provides a platform to entice more young people to holiday in Australia - but also to work," a Tourism Australia spokesman said.

"Although the competition was open to Australians - and more than 40,000 applied - the international focus is on markets already offering WHM programs, including the UK and Ireland, the US and Canada, Germany, France, Italy, Sweden, Hong Kong, Taiwan, South Korea and Japan.

"In the end, we didn't get any Australians quite making the final 18, but they did their country proud."

The spokesman said seventeen Australians made the Top 150 short-list and while several came very close to being named finalists they came up a fraction short.

"People applied from 196 countries, and unfortunately a lot of nations have missed out, including our own," he said.

"Good luck to all the candidates who have made the final 18. They were clearly incredibly hungry to secure one of these six dream jobs and find out what most Australians already know that Australia is an incredible place to work and play."

Heidi Klum Tourism AustraliaSource:Supplied

Tourism Australia managing director Andrew McEvoy said choosing the finalists had proved to be one of the hardest jobs in the world.

"Such has been the quality of the candidates that Tourism Australia has created its own 'Best Job', working for us in our social media team," he said.

"Ellenor's photography work is terrific and she comes with very strong references and a proven record of being able to get her work noticed.

"The fact that she is Australian with a genuine passion for promoting her country makes her even more ideally suited for this special role."

The six winners - one for each state and territory taking part - will be announced in Sydney on June 21.